350 lines
14 KiB
Rust
350 lines
14 KiB
Rust
/*
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* meli - bin.rs
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*
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* Copyright 2017-2018 Manos Pitsidianakis
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*
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* This file is part of meli.
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*
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* meli is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* meli is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with meli. If not, see <http://www.gnu.org/licenses/>.
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*/
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//! Command line client binary.
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//!
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//! This crate contains the frontend stuff of the application. The application
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//! entry way on `src/bin.rs` creates an event loop and passes input to a
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//! thread.
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//!
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//! The mail handling stuff is done in the `melib` crate which includes all
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//! backend needs. The split is done to theoretically be able to create
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//! different frontends with the same innards.
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use std::os::raw::c_int;
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use args::*;
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use meli::*;
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fn notify(
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signals: &[c_int],
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sender: crossbeam::channel::Sender<ThreadEvent>,
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) -> std::result::Result<crossbeam::channel::Receiver<c_int>, std::io::Error> {
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use std::time::Duration;
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let (alarm_pipe_r, alarm_pipe_w) =
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nix::unistd::pipe().map_err(|err| std::io::Error::from_raw_os_error(err as i32))?;
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let alarm_handler = move |info: &nix::libc::siginfo_t| {
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let value = unsafe { info.si_value().sival_ptr as u8 };
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let _ = nix::unistd::write(alarm_pipe_w, &[value]);
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};
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unsafe {
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signal_hook_registry::register_sigaction(signal_hook::consts::SIGALRM, alarm_handler)?;
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}
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let (s, r) = crossbeam::channel::bounded(100);
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let mut signals = signal_hook::iterator::Signals::new(signals)?;
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let _ = nix::fcntl::fcntl(
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alarm_pipe_r,
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nix::fcntl::FcntlArg::F_SETFL(nix::fcntl::OFlag::O_NONBLOCK),
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);
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std::thread::spawn(move || {
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let mut ctr = 0;
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loop {
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ctr %= 3;
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if ctr == 0 {
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let _ = sender
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.send_timeout(ThreadEvent::Pulse, Duration::from_millis(500))
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.ok();
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}
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for signal in signals.pending() {
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let _ = s.send_timeout(signal, Duration::from_millis(500)).ok();
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}
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std::thread::sleep(std::time::Duration::from_millis(100));
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ctr += 1;
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}
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});
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Ok(r)
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}
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fn main() {
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let opt = Opt::from_args();
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::std::process::exit(match run_app(opt) {
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Ok(()) => 0,
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Err(err) => {
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eprintln!("{}", err);
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1
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}
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});
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}
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fn run_app(opt: Opt) -> Result<()> {
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if let Some(config_location) = opt.config.as_ref() {
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std::env::set_var("MELI_CONFIG", config_location);
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}
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match opt.subcommand {
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Some(SubCommand::TestConfig { path }) => {
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return subcommands::test_config(path);
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}
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Some(SubCommand::CreateConfig { path }) => {
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return subcommands::create_config(path);
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}
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Some(SubCommand::EditConfig) => {
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return subcommands::edit_config();
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}
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Some(SubCommand::Man(manopt)) => {
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return subcommands::man(manopt);
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}
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Some(SubCommand::CompiledWith) => {
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return subcommands::compiled_with();
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}
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Some(SubCommand::PrintLoadedThemes) => {
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let s = conf::FileSettings::new()?;
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print!("{}", s.terminal.themes);
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return Ok(());
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}
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Some(SubCommand::PrintDefaultTheme) => {
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print!("{}", conf::Themes::default().key_to_string("dark", false));
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return Ok(());
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}
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Some(SubCommand::View { .. }) => {}
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None => {}
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}
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/* Create a channel to communicate with other threads. The main process is
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* the sole receiver.
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*/
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let (sender, receiver) = crossbeam::channel::bounded(32 * ::std::mem::size_of::<ThreadEvent>());
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/* Catch SIGWINCH to handle terminal resizing */
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let signals = &[
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/* Catch SIGWINCH to handle terminal resizing */
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signal_hook::consts::SIGWINCH,
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/* Catch SIGCHLD to handle embed applications status change */
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signal_hook::consts::SIGCHLD,
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];
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let signal_recvr = notify(signals, sender.clone())?;
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/* Create the application State. */
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let mut state;
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if let Some(SubCommand::View { path }) = opt.subcommand {
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state = subcommands::view(path, sender, receiver.clone())?;
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} else {
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state = State::new(None, sender, receiver.clone())?;
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#[cfg(feature = "svgscreenshot")]
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state.register_component(Box::new(components::svg::SVGScreenshotFilter::new()));
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let window = Box::new(Tabbed::new(
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vec![
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Box::new(listing::Listing::new(&mut state.context)),
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Box::new(ContactList::new(&state.context)),
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],
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&state.context,
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));
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let status_bar = Box::new(StatusBar::new(&state.context, window));
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state.register_component(status_bar);
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#[cfg(all(target_os = "linux", feature = "dbus-notifications"))]
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{
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let dbus_notifications = Box::new(components::notifications::DbusNotifications::new(
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&state.context,
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));
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state.register_component(dbus_notifications);
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}
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state.register_component(Box::new(
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components::notifications::NotificationCommand::new(),
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));
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}
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let enter_command_mode: Key = state
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.context
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.settings
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.shortcuts
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.general
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.enter_command_mode
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.clone();
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let quit_key: Key = state.context.settings.shortcuts.general.quit.clone();
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/* Keep track of the input mode. See UIMode for details */
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'main: loop {
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state.render();
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'inner: loop {
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/* Check if any components have sent reply events to State. */
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let events: smallvec::SmallVec<[UIEvent; 8]> = state.context.replies();
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for e in events {
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state.rcv_event(e);
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}
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state.redraw();
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/* Poll on all channels. Currently we have the input channel for stdin,
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* watching events and the signal watcher. */
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crossbeam::select! {
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recv(receiver) -> r => {
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match r {
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Ok(ThreadEvent::Pulse) | Ok(ThreadEvent::UIEvent(UIEvent::Timer(_))) => {},
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_ => {
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log::trace!("{:?}", &r);
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}
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}
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match r.unwrap() {
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ThreadEvent::Input((Key::Ctrl('z'), _)) if state.mode != UIMode::Embed => {
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state.switch_to_main_screen();
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//_thread_handler.join().expect("Couldn't join on the associated thread");
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let self_pid = nix::unistd::Pid::this();
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nix::sys::signal::kill(self_pid, nix::sys::signal::Signal::SIGSTOP).unwrap();
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state.switch_to_alternate_screen();
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// BUG: thread sends input event after one received key
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state.update_size();
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state.render();
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state.redraw();
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},
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ThreadEvent::Input(raw_input @ (Key::Ctrl('l'), _)) => {
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/* Manual screen redraw */
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state.update_size();
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state.render();
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state.redraw();
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if state.mode == UIMode::Embed {
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state.rcv_event(UIEvent::EmbedInput(raw_input));
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state.redraw();
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}
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},
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ThreadEvent::Input((k, r)) => {
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match state.mode {
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UIMode::Normal => {
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match k {
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_ if k == quit_key => {
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if state.can_quit_cleanly() {
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drop(state);
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break 'main;
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} else {
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state.redraw();
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}
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},
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_ if k == enter_command_mode => {
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state.mode = UIMode::Command;
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state.rcv_event(UIEvent::ChangeMode(UIMode::Command));
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state.redraw();
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}
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key => {
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state.rcv_event(UIEvent::Input(key));
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state.redraw();
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},
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}
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},
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UIMode::Insert => {
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match k {
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Key::Esc => {
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state.rcv_event(UIEvent::ChangeMode(UIMode::Normal));
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state.redraw();
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},
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k => {
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state.rcv_event(UIEvent::InsertInput(k));
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state.redraw();
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},
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}
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}
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UIMode::Command => {
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match k {
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Key::Char('\n') => {
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state.mode = UIMode::Normal;
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state.rcv_event(UIEvent::ChangeMode(UIMode::Normal));
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state.redraw();
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},
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k => {
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state.rcv_event(UIEvent::CmdInput(k));
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state.redraw();
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},
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}
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},
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UIMode::Embed => {
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state.rcv_event(UIEvent::EmbedInput((k,r)));
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state.redraw();
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},
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UIMode::Fork => {
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break 'inner; // `goto` 'reap loop, and wait on child.
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},
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}
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},
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ThreadEvent::RefreshMailbox(event) => {
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state.refresh_event(*event);
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state.redraw();
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},
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ThreadEvent::UIEvent(UIEvent::ChangeMode(f)) => {
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state.mode = f;
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if f == UIMode::Fork {
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break 'inner; // `goto` 'reap loop, and wait on child.
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}
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}
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ThreadEvent::UIEvent(e) => {
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state.rcv_event(e);
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state.redraw();
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},
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ThreadEvent::Pulse => {
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state.pulse();
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},
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ThreadEvent::JobFinished(id) => {
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log::trace!("Job finished {}", id);
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for account in state.context.accounts.values_mut() {
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if account.process_event(&id) {
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break;
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}
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}
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},
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}
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},
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recv(signal_recvr) -> sig => {
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match sig.unwrap() {
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signal_hook::consts::SIGWINCH => {
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if state.mode != UIMode::Fork {
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state.update_size();
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state.render();
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state.redraw();
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}
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},
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signal_hook::consts::SIGCHLD => {
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state.rcv_event(UIEvent::EmbedInput((Key::Null, vec![0])));
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state.redraw();
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}
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other => {
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log::trace!("got other signal: {:?}", other);
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}
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}
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},
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}
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} // end of 'inner
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'reap: loop {
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match state.try_wait_on_child() {
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Some(true) => {
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state.restore_input();
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state.switch_to_alternate_screen();
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}
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Some(false) => {
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use std::{thread, time};
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let ten_millis = time::Duration::from_millis(1500);
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thread::sleep(ten_millis);
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continue 'reap;
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}
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None => {
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state.mode = UIMode::Normal;
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state.render();
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break 'reap;
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}
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}
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}
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}
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Ok(())
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}
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